Recording apparatus



Oct.- 26, 1943.

E. S. SVENSSON RECORDING APPARATUS Filed March 4, ,1959

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3 Sheets-Sheet l ATTORNEY Oct. 26, 1943. E. s. svx-:NssoN 2,332,819

RECORDING APPARATUS Filed March 4, 1939 3 Sheets-Sheet 2 A TTORNE Y OCt26, 1943 E.. s. svx-:NssoN 2,332,819

RECORDING APPARATUS Filed March 4, 1959 5 Sheets-Sheet 5 A TTORNEYPatented Oct. 26, 1943 RECORDING APPARATUS Ernst S. Svensson, New York,N. Y., assignor to The Kron Company, Bridgeport, Conn., a corporation ofConnecticut Application March 4, 1939, Serial No. 259,787

17 Claims. (Cl. 23A-5.4)

This invention relates to recording apparatus and particularly to powerdrivenmechanisms of rugged nature suited to severe conditions of servicesuch as the recording of weights measured by heavyk industrial scales.This application is a continuation in part of my co-pendingapplicationSerial No. 83,870, filed June 6, 1936, which has eventuated in PatentNo. 2,198,139.

An important object of the improvements is to construct a recordingapparatus for the stated purpose whose operating parts are strong andperform substantial extents of movement thereby to eliminaterequirements for extreme accuracy and ine dimensioning of the parts.

A related object is to support and constrain the operating parts at wellspaced points to render them individually accessible and to augment theamount of movement cooperatively performed by the parts at their pointsof operative engagement.

A further object is to separate a portion of the apparatus consisting ofthose mechanisms which operate the printing type from that portion ofthe apparatus which comprises the more rugged and heavier powermechanism, and to provide, for transmitting power from the lattermechanism to the former mechanism, a single movable part which byconvenient detachment from either mechanism will permit that mechanismto be removed from the apparatus as a unit and replaced by a similar ordiiferent unitwith ease and dispatch when the apparatus requiresservicing in the field.

` A related object is to aiord a separation of the above mentioned twosets of mechanism which will enable them to be separately housed ifdesired whereby the printing mechanism may be protected from dirt. andlubricants which are commonly present in power mechanisms.v

A further object is to provide a cycle stop power mechanism which willautomatically terminate a manually'initiated cycle of recording movementvand torprovide a manual controller for initiating thei cycle ofmovement which does not require the operator to wait or attend thecontroller after it is once manipulated to initiate the recordingoperation.

- `A further object is to provide in a power mechanism for recordingapparatus suitable safeguards yieldingly to check the coasting movementof the power" mechanism after the source of power has been automaticallydisconnected therefrom and before some predetermined position of thepower driven parts has been reached at the end of each recordingoperation.

A further object is to govern the motivation of the entire apparatusfrom a single power operated shaft and Va plurality of cams rotated inunison thereby.

In the drawings:

Fig. 1 is a front view of the entire recording mechanism.

Fig. 2 is a side elevation looking from the left at Fig. 1 and furthershows the portions of stepped members which may be employed to determinethe value registering positions of the type segments, Fig. 2 being drawnon a smaller scale than Fig. 1.

Fig. 3 is an enlarged fragmentary view taken in section on the plane 3-3in Fig. 2 looking in the direction of the arrows.

Fig. 4 is a correspondingly enlarged fragmentary View taken in sectionon the plane 4 4 in Fig. 5 looking in the direction of the arrows.

Fig. 5 is a plan view of the upper portion of the mechanism in Fig. land is drawn on a corresponding scale.

The recording mechanism as a whole may be viewed as comprised of twomain systems ofparts which may respectively be termed the typeregistering mechanism, and the power and printing hammer mechanism.

Type registering mechanism This mechanism isbest shown in Figs. 1, 2, 4,and 5. One or more horizontal feeler rods I0 are mounted forLlongitudinal sliding movement in apertures through the main verticalframe plate II and in .respectively aligned rectangular aperturesthrough the offset bracket I2 shown mounted on the exterior surface offrame plate II in Figs. 2 and 5. Feeler rods I0 are equipped with anysuitably thin edged feeler terminals I3 which are constantly urgedtoward steps on peripherally notched wheels I4, I 5, etc., by individuallight springs I6, each of which springs surrounds a rod I0 and iscompressed between a collar I'I carried thereby and the frame plate II.The stepped wheels I4 andY I5 are representative of any adjustablypositionable stops which may be located respectively vin the paths ofthe different feeler terminals I3. For an example of one pos siblepurpose and function of such stepped Wheels reference 'may be had to theco-pending application ofrGlenn E. Weist, Serial No. 753,842, now PatentNo. 2,173,746 wherein similar discs are designed to be rotativelypositioned in accordance with the weights of a load and by the automaticaction ofV a weighing scale in order that the weights measured therebymay be recorded.

which is shown in Fig. 2 to be mounted at its rear' end upon the mainvertical frame plate and removably held thereon by bolts 32.

The upper end of each type segment I9 is pivotally connected to a clevis22 from which a connector 23 extends rearwardly and terminates in asimilar clevis 24 pivotally connected to the forward end of acorresponding feeler rod IU.

The effective length of any connector 23 may be adjusted finely by athreaded coupling 25 interposedbetween separate rod parts oftheconnector and having threaded engagement therewith and lockable inadjusted position by the end nuts 26 which also have threaded engagementwith the rod parts.

In Figs. 1 and 5 the type segments |9 are seen to be axially spaced bysuitable collars .21 which Surround the support shaft 20 and it will beplain that a considerably greater number of type segments than the fourshown, together with additional manually settable type segments carryingany desired data, can be accommodated within the space between the sidesof the frame casting 2|.

The normal, or non-printing position of the type segments is as picturedin full lines in Figs. 1, 2 and 5 and this position is brought aboutthrough the action upon all of the rods l of an actuating bail comprisedof the transversely disdepending projections 3| respectively carried bythe rods I0 (see Fig. 4). Thus the bail rod 28 may act to force all ofthe rods IIJ simultaneously toward the front against the opposition oftheir compression springs I6 orby movement toward the rear may releaseallof rods I0 to the individual action of such springs as individuallyand respectively limited by the notched wheels |4, .|5, etc.

The inking ribbon is designated as 54 in Figs. 1, 2 and 5 of thedrawings. Between theribbon spools 60 and 85, the ribbon extends arounda left guide pulley 92 and a right guide pulleyy 93, each of vwhichpulleys is rotatively mountedv by'a construction more fully disclosed inmy aforesaid co-pendingapplication. The shoulder stud 94 retains andgives bearing to the guide pulley and penetrates the extremity of ahorn-like projection 95 of the frame casting. The rearwardly projectingend of stud 94 serves to mount a pressorl bracket 96 which is rigidlyretained thereon by the fastening nut 91. The pressor bracket 96 ismostl clearly shown to afford sliding support for the stem 98 of apressor disc 99 which is constantly urged inwardly by the compressionspring |00 so that pressor disc 99 yieldingly bears upon the inkingribbon 54 while the latter is in contact with its guide pulley 92 or 93.

Power and printing hammerv mechanism This mechanism is locatedcompletely below the floor plate |02 which at its rear end is supportedupon the bracket |50 and at its forward end is supported upon vtheupstanding portions of the lower frame .casting which in effect formspaced standards. Most of the power and printing hammer mechanism issupported between the two sides of frame casting |5| which itselfderives supportV from the main frame plate to which it is secured at therear end in removable manner by bolts as.

Any suitable electric motor |52 may be separately mounted upon the mainframe plate and the motor shown has its shaft equipped with a drive Worm|53. The worm wheel |54 is in mesh with worm |53 and rotates the shaft|55 to which it is fixed. Shaft |55 has bearing at each of its ends inthe frame casting |5| and also carries fixed thereto the pinion |56.Pinion |56 is in mesh with'v the large gear |51 which is xedly carriedby the cam shaft |58.l Cam shaft |58 also spans and has bearings in thetwo sides of frame casting |5| and iixedly carries between the framesides a cam |59 for controlling the printing hammer. Outside the leftbearing in the frame casting shaft |58 carries acam |68 for controllingthe bail arm 29 and thereby the type registering and ribbon feedmechanisms, At its left extremity in Fig. 1 cam shaft 58 also rotates anelectric switch operating cam |8| thereby to automatically interrupt thecircuit to the electric motor |52 when a cycle of recording action hasbeen completed.

The printing hammer comprises a strip of suitable platen material |62securely mounted on the top surface of a hammer block |63 which at bothends is guided for vertical sliding movement in the frame casting |5|bymeans of grooves or Ways sunk in the latter. Block |63 carries thehorizontal rod |64 which pivotally supports two depending links |65 and|66. The lower ends of these links are pivotally engaged by a similarhorizontal 'rod |61 which is swingingly supported by and connects thefree ends of two forwardly projecting arms |68 and |69 which arms areflxedly mounted upon shaft |16 in spaced relation. The ends of shafthave bearings in the frame casting |5. At a central portion, shaft |10xedly carries the hub |1| of the cam follower arm |12 whose rearwardlyextending end is equipped with a roller |13 riding in contact ywith theperiphery of cam |59. At the right sideof the frame casting, shaft |10fixedly carries the stub arm |14 with which is connected the hammeractuating spring whose rear end is anchored to a bracket |16 mounted onthe main frame plate l. K y

The outer left surface of the frame casting llt is equipped with twobearing'lugs |11 and |18 which guide a longitudinally sliding plunerdevice. consisting of a rod |19 rigidly carrying` the clevis |88 at itsrear end and thereby pivotally connected to the lower extremity of theball arm 29. vBoth this bail arm and the corresponding bail arm at theright side of the frame casting are rigidly mounted on the oppositeextremities respectively of a pivot shaft |`8| which extends through andhas bearings in both sides of the frame casting. v

The rod .|19 of the plunger device may have il'. sufllcientlyloose fitin the bearing lug |11 to permit the pivot pin |82 in cl'ev'ls |86 tofollow the arc of swing of the lower extremity of bail Hedge of itsbifurcation with the top edge of bar Varm 29 but rod |19 is madeirigldwith a sliding bar |83 at its forward-endwhich is preferably ofrectangular cross section and a good sliding flt Within a correspondingaperture through the bearing lug |18. A roller |84 is pivotally carriedat theiorked extremity of bar |83 and is con- -stantly pressed againstvthe periphery of cam |80 by the compression spring |85 looselysurrounding Vrod |19 and bearing against the lug |11 at its rear endwhile its forward `end bears againsta thrust Washer |88, fast to bar|83;

f |81 represents a current supply wire running directly to the windingsof the electric motor |52. lnects one switch contact |89 to the sourceof Another supply wire I 88 electrically concurrent supply. The otherswitch contact |90 isccnnected tothe motor by a wire I9I so that makingand breaking electrical contact between -parts |89 and |90 willrespectively start and stop in its movement toward the'front by theengagement with saidl bracket of a cross pin |95. The forward Aend ofbar |93 is slidingly sup- `ported in a downwardly and laterallyextendingportion of the frame casting |I and is equipped with amanual operatinghandle |96. A dog |91 is pivoted at |98 to the bar |93 and straddlesthis bar in a bifurcated lower portion |99 as shown in Fig. 3 andprojects upwardly for engagement by the cam IBI.

Dog |91 is constantly urged counter clock- 'wise in Fig. 2 by springs200 and 20|, being normally disposed in upstanding position as shown inFig. 2 by the engagement vof the rear |93 whereas the higher dispositionof its front bifurcated edge permits at times relative swinging of thetop of-dog |91 toward the right in Fig. '2 by overpowering of thetension in springs 200 and 20|.

This tension, however, is suiiiciently strong to -enable counterclockwise rotation of cam I6I in Fig. 2 to pick up and impel the' bar|93 to its position shown in Fig. 2 by engagement with dog |91 for thepurpose of opening the switch.

Operation of type registering and printing mechanism f lThe poweroperated type registering and print'- ing mechanism is shown in Figs. 1and 2 as its parts are positioned when the electric motor |52 has beenout out rof circuit automatically at the end ofa cycle of recordingaction. During a single cycle of such action, the cam shaft |58 performsa half turn .counterclockwise in Fig.

2. The cycle is initiated by manually pushing the switch knob |96 as faras it will go toward the left in Fig, 2.` In this movement the dog |91will tip toward the right as permitted by the The switch plug |92 thencompletes the causing motor |52 to start running thus rotating 'worm|53, worm wheel |54, shaft |55, pinion |56, gear |51, and thereby thecam shaft |58 'togetherwith the three cams |59, |60 and. |6| ;A

`fixed thereto,` Iin Fig. 2.

jfollower arm in a counterclockwise direction A very small amount ofrotation of cam |60 will permit roller |84 which rides in contacttherewith, to move suddenly toward the right under the power of thespring and the consequent pulling of the lower end of bail arm 29 towardthe right about its pivot I8I will throw the upper portions of bail arms29 and 30 toward the left in unison together with their carried bail rod28. By thus moving away from the projections 3| on all of the feelerrods I0 simultaneouslyl each of these rods is released or delivered tothe thrust of its. individual spring I6 which will carry each feelerterminal I3 toward the left in Fig. 2 until it is intercepted or blockedin its movement.

While many devices are known in the art of registering mechanisms forblocking the spring urged advance movement of type positioning feelerelements for conditioning the type to print some recordable Value, anyof which devices may be used for that purpose with my improved recordingmechanism, there is lherein illustrated for that purpose the differentlynotched periph- 'eries of respectively separate wheels such as I4 and I5of which there may be one for each diierent feeler terminal I3 and whichmay be rotatively positioned by the automatic action of a weighing scale(not shown), or otherwise.

As each of rods I0 moves toward the left in Fig. 2 a distance determinedby the notched wheels I4 .and |5, it will, through its connection to acorresponding type segment I9, swing that segment counterclockwise inFigs. 2 and 9 a corresponding degree of travel about the pivot shaft 20so that the proper one of type characters I8 will be positioned inprinting position vertically beneath the segment pivot. Fig. 2represents one or the type segments I9 by broken lines as having beenswung to a suitable printing position. y i

When the proper positioning of 'all type segments I9 has been thusaccomplished, cam |59 will have rotated far enough in Fig. 2 todischarge the roller |13 from its highest peripheral point into thesegmental' notch in cam |59 whereupon under the power in spring |15, the

|12 will abruptly swing downwardly in Fig. 2 causing counterclockwiserotation of shaft |10 and by means of arms |68 and |69 causing theconnecting rod pivots |61 to be abruptly elevated. By this action thehammer block |63 is caused to deliver a smart blow upwardly through theaction of the connecting links |65 and |68 so that the platen |82momentarily presses upwardly against the type characters which are inits path on all of the segments I9, a, rectangular aperture |03 in thefloor plate |02 accommodating this action.

Thus by means of. the inked ribbon 54 which is stretched laterallyslightly above the floor plate |02 in alignment with the platen |62, arecord will be `printed from all of the type segments which have beenmoved to printing position, upon any piece of paper or cardboard whichmay be interposed between the ribbon and the topv surface of the floorplate |02.

The cam shaft |58 continues to travel after the record has been struckand in so doing proceeds to restore both the bail arm 29 and hammerblock |63 to their starting positions shown in Fig. 2 whereby all of thetype segments |9 and feeler rods I0 are correspondingly restored.

[When the follower rollers |13 and |84 have thus arrived at thediametrically opposite high points on the peripheries of theirrespective cams, the top end of cam |6| will have rotated to a positionbefore completing its half turn in which it will engage and force to theright the top end of dog |91 in Fig. 2. Springs 200 and 20| aresufliciently strong to pull the switch block |92 out from betweencontacts- |99 and |90 without permitting the dog" |91 to swing upon itspivot |98 so that all of the parts become restored to their positionsinrlg. 2 except that the three cams |59, |90, and IBI are diametricallyreversed. vThese cams, however, are symmetrical with respect to anydiameter through their axis so that a subsequently repeated half turn ofcam shaft |58 will precisely repeat the cycleof recording operationwhich has been described. After current has been cut of! from .motor|52, there may be slight variation in ,the .amount of overrun of theparts which are rotated therebyI due to inertia, but a check on thisinertia effect will be exerted by dog |91 after bal' |93 has beenpositively stopped by thevpin engaging bracket |94 owing to the tensionin spring 200.

For additional assurance against too much overrun travel of cam shaft|58 after the motor is (ie-energized, the bump H9 may be formed on theperiphery of cam |59, which, upon engaging with roller |13 will augmentthe yielding resistance to continued rotation of the cam shaft |58before the cam |60 shall have coasted far enough counter-clockwise toArecede from the path of roller |84. If springs 200 and are madesufficiently weak they will stretch before overcoming the frictionalcling of contacts |89 and |90 upon the switch block |92 but will iinallyovercome this clingand thereby produce a snap action of block |92 to theright to cause a quick breaking of the circuit as is desirable when itis important to minimize arcing.

For brevity inthe appended claims, the two bail arms 29 and 30 and theirconnecting structure aretermed an impeller or movement transmitter itbeing clear'that all power for motivating the parts of the typeregistering and ribbon feeding mechanism is transmitted therethrough andrequires only toV be disconnected from the parts 28 and 40 tooperatively Vdis-associate the lower power mechanism from the upper typepositioning mechanism. In fact, only disengagement of rackbars 90 and.Il from their guide pins 44 and l0 is necessary to permit removal andreplacement of the type registering mechanism as a unit withoutdisconnecting the bail 29, 30 from any of its associated parts.

The advantages of these improvements may be obtained by the use vofparts differing widely from the exact shape and arrangements hereindisclosed to illustrate the invention, and the following claims will beunderstood to include by their terms all fair equivalents for theparticular parts land constructions to which they refer.

I claim: l Y l. In recording apparatus includingrecording characters,the combination of, a source of power,

Cil

assumo excursions is repeated including a power disconnecting member,'and connections operably relatins' said member to the second of saidcams .in a manner to cause said member to disconnect the source of powerfrom said shaft at least twice during said single revolution of thelatter.

2. In recording apparatus the combination dofined in claim l in whicheach of the said cams is symmetrically shaped with respectV to-anydiametricol line passing through its axis of rotation and in which thesaid .cams are held in constant rotative relation such that a half turnof both cams; compltes the said excursion of the said record makingdevice and also operates the said .power disconnecting member to deprivethe said shaft of power.

3g In recording apparatus an electrically powered recording mechanismincluding a cam having a working face contour which repeats itselfaround the periphery of the cam adapted to be intermittently rotatedsubstantially less than a full turn by alternate application and cut of!of power, a record striking device constructed and arranged to bemotivated by less than a half revolution of said cam in a manner tocomplete a cycle of recording action during said half revolution, asecond cam, a source of power adapted manually to be energizedindependently of the movement of said second cam, and connectionsoperated by said second cam in a manner automatioally to deenergize saidsource of power a plurality of times during one complete turn of saidsecond cam.

1.A In recording apparatus, electrically powered mechanism as defined inclaim 3 together with a spring biased stop member disposed in the pathof `travel of the said cam in a manner yieldlngiy to oppose coastingthereof after its said deceleration begins.

5.*In sectionally constructed recording apparatus, the combination of.`frame work including a standard carrying a vertically elongatedguideway and determining the location of a printing station at the topthereof, a power mechanism comprising a section of said apparatusextending rearward from the bottom of said standard, an impressionstriker guided by said standard to per'- form vertical movement towardand away from Asaid printing station, a type positioning mechanismsuperimposed above and extending rearward from the tcp of said standardand presenting type at said printing station for cooperation with saidstriker thereat to print a record, and means to transmit movement fromsaid power mechanism to said type positioning mechanism including alever paralleling and longer than said standard swingably mounted onsaid framework near the rear of said mechanisms and constructed andarranged operatively to connect said mechanisms.

6. In a sectionally constructed recording apparatus, the combinationdefined in claim 5, in which the said frame work is' sectional, andcomprises a vertically elongated holding structure, a. horizontallyelongated lower frame bracket detachably mounted on said holdingstructure and carrying the said power mechanism, and a horizontallyelongated upper frame bracket detachably mounted on said holdingstructure and carrying the said type positioning mechanism, the saidrtransmitting lever being detachably related to eac-h of said mechanismswhereby either oi' vasi-id mechanisms may be' removed from the recordingapparatus as a unit without disturbing the other of said mechanisms.

i 7. In a sectionally constructed recording appafratus as defined inclaim 5, the combination deflned Vin said claim in which the said typepositioning mechanism includes pivotally mounted typeLcarrying segments,together with a series of separate springs connected to bias the saidtype carrying segments respectively away from nonprinting position, andan impelling element motivated by.l the saidmeans to transmit movementin a. manner to overcome the bias of said springs and thereby force saidsegments into non-printing position. 8. In sectionally constructedrecording apparatus, the .combination defined in claim in which the saidimpression striker includes a horizontally elongated platen block,together with vertically extending guideways stationed on the saidstandard beneath the said printing station and slidably engaged by theends of said platen block in a manner to guide the latter in a verticalpath of movement, and devices operatively connecting the said powermechanism to said platen block.

9. In recording apparatus, the combination of, an apparatus supportframe, a type carrying segment pivot-ally mounted on said frame forswinging movement, a rectilinear guideway on said frame, a stop sensingfeeler element constrained by said guideway to slide in a straight pathof lengthwise travel, a floating rod-like coupling pivotally connectedat one end to said feeler and at the 'opposite end to said segment, aspring operating between said frame and said feeler element in a mannerto urge the latter in a direction away from said segment, and means toimpel said feeler element in a direction toward said segment against thebias of said spring.

10. In recording apparatus, an electro mechanical system adapted both tocomplete and to terminate a manually initiated cycle of recording actioneffected by substantially less than a full turn of a motivating cam,including in combination with a plural lobed motivating cam, recordingmechanism, a follower engaging said cam connected to repeatedly actuatea portion of said recording mechanism during a single full revolution ofsaid cam, a manually shiftable electric switch control member, anelectric motor electrically connected to be energized and de-energizedby movements of said member in respectively reverse directions, andmeans rotated in unison with said cam constructed and arranged to shiftsaid member in a direction to repeatedly deenergize said motor during asingle revolution of said cam and means.

1l. In recording apparatus, the combination defined in claim 9 in whichsaid floating coupling includes means constructed and arranged to varythe length of said device land simultaneously to maintain the rigiditythereof.

12. In recording apparatus in combination with printing mechanism, apower driven cam, a follower for said cam connected to operate saidprinting mechanism, means to deprive said cam of driving power, and aspring biasing said follower in relation to said cam in a manner tooppose movement of the former by the latter, said cam having a portionof its follower contacting surface shaped and arranged to move saidfollower an extraordinary distance against the bias of said springthereby to increase the force with which said spring opposes coastingtravel of said cam after the latter is deprived of its driving power.

13. In recording apparatus the combination defined in claim 17, in whichthe said motor control means includes electrical switch contacts forvstopping and starting said motor, a contact operating member mountedand arranged to be movable free from bias between motor starting andmotor stopping position, a spring biased latch dog carried by saidmember, the said second one of said cams being connected to be rotatedby said motor and shaped and positioned to engage said dog in a mannerto impel said contact operating member in a direction opposite to thatin which said dog is biased.

14. In recording apparatus the combination with shiftable recordingcharacters of, an electric motor, a device constructed and arranged toperform an excursion for making a record from said characters, a shaftrotatable by said motor, means to transmit motion from said shaft tosaid characters, plural actuating cams rotated in unison by said shaft,connections actuated by one of said cams for causing said excursion ofthe record making device, electrical motor control means including amember operably related to-a second one of said cams constructed andarranged when moved thereby to de-energize said motor before saidexcursion is repeated, together with a handle device constructed andarranged to move said member reversely and independently of the lastsaid cam thereby to re-energize said motor, the said motor control meansincluding an electric switch for energizing and de-energizing saidmotor, a switch actuating bar supported for lengthwise movement, a dogpivoted to said bar, a spring biasing said dog to a definite positionrelative to said bar so that said dog projects therefrom into the pathof movement of said second one of said cams, and a handle carried bysaid bar, the said dog being constructed and arranged to yield againstthe resistance of said spring in va manner to permit manual shifting ofsaid bar in a direction to actuate said switch independently of theposition of said cam.

l5. In recording apparatus the combination with shiftable recordingcharacters of, an electric motor, a device constructed and arranged toperform an excursion for making a record from said characters, a shaftrotatable by said motor, means to transmit motion from said shaft tosaid characters, plural actuating cams rotated in unison by said shaft,connections actuated by one of said cams for causingsaid excursion ofthe record making device, electrical motor control means including amember operably related to a second one of said cams constructed andarranged when moved thereby to de-energize said motor before saidexcursion is repeated, together with a handle device constructed andarranged to move said member reversely and independently of the lastsaid cam thereby to i'e-energize said motor, the said motor controlmeans including, electrical switch contacts for stopping and startingsaid motor, a contact operating member mounted and arranged to bemovable free from bias between motor starting and motor stoppingposition, a spring biased bifurcated element pivotally connected to saidcontact operating member in its bifurcated portion and further shapedand arranged to straddle said member in a manner to abut thereagainst atthe crotch of said bifurcated portion thereby to limit the extent ofswinging movement of said element relative to said member, said secondone of said cams being connected to be rotated by said motor and shapedand positioned to engage said element in a manner to impel said contactoperating member in a direction opposite to that in which said elementis biased.

A i6. In recording apparatus the combination, with; striftable recordingcharacters, of an. electric motor, adevice. constructed and. arranged toperform an excursion. for making; a; record from said characters, ashaft rotatable by said motor, plur'al actuating cams rotated in unisonby said shaft, means to transmit motion from said shaft to saidcharacters including one of said cams, connections actuated. by oneof'said cams for causing said excursion of the record making, device,electrical motor control means including a switch operating memberoperably related to one of said. cams constructed and arranged to bemoved thereby in a switch-opening direction to de-energizesaid motorbefore said excursion is repeated, together with devices constructed andarranged to move said membery in a direction dif,- ferent from saidswitch-opening direction to enable said member to escape said cam andthereby free said. member for switch closing movement to re-energizesaid motor.

17. In recording apparatus the combination with shiftable recordingcharacters of an electric motor, a device constructed and arranged toperform an excursion for making a record from said characters, a shaftrotatable by said. motor, means to transmit motion from said shaft tosaid characters, plural actuating cams rotated in unison by said` shalt,connections actuated by one of said cams' for causing said excursion of:the rec,- ord making device, electrical motor control mem including amember operably related to a secomi one of said cams constructed andarranged, when moved one direction thereby to dev-energize said motorbefore said excursion is repeated, together with a. handle deviceconstructed and arranged to movesad member'in a reverse direction andindependently of the last said cam. thereby to 11e-energize said motor.y

ERNST S. SVENSSON.

CERTIFICATE CE CORRECTION. Patent No. 2,552,519. october 26, 19M.

ERNST s. svENssoN.

It is hereby certified that error appears in th-e printed spe oificatonof the above numbered patent requiring; correoti on as follows Page L,second co lumn, line 57, cl aim Ji, before the word "said" insert--irst; and that the said Letters Patent should be read with thiscorrection therein that the ,same may conform to the record of the casein the Patent Office.

Signed and sealed this 2l st day of December, A. D. 3.9i@

Henry Van Arsdale, (Seal) Acting Commissioner of Patents.

CERTIFICATE 0R CORRECTION. Patent No. 2,552,819. october 26, 19M.

ERNST s. svENssoN.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring, correction as follows: Page li,second column, line 57, Claim L1., before the word "said" insert--first; and

that the said Letters Patent should be read with this Correction thereinthat the `same may conform to the recordrof the case in the PatentOffice.

Signed and sealed this 21st day of December, A. D. l9li5.

Henry Van Arsdale,

(Seal) Acting; Commissioner of Patents.

